Making double-walled vacuum vessels.



A A l R.BURGBR. MAKING DOUBLE WALLED VAGUM vEssBLs.'

APPLICATION FILED JAN. 5, 1909.-`

Patented June 1, 1909.

kif

fusing together the contiguous open ends of vmcuum vin said s ace, and eighth, 'closing said cylinders: vthird, closing the open end saidremaning tu ular projection. 1G of the outer cylinder leavin sid support In testimony whereof I have axed my ing body in place: fourth, orming on sid signature in presence of two witnesses.

closed end two tubular projections: fifth, l l REINHOLDBUBGER. introducing coating solution into said space: Witnses:

sixth, cosmg one of said tubular projec- WQLDEMAR HAUYIf tions: seventh, producing substantially a HENRY'HASER. 

